CMOS CAMERAONCHIP WITH POLARIZATION DIFFERENCE IMAGING

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CMOS CAMERA-ON-CHIPWITH POLARIZATION DIFFERENCE
IMAGING
UNIVERSITY OF PENNSYLVANIA
EE Senior Design First Place

• April 29, 2003
• Kunal K. Ghosh
• King W. Yeung

Advisors Dr. Jan Van der Spiegel
Dr. Nader Engheta
KGKY-1 04/29/03
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Agenda
UNIVERSITY OF PENNSYLVANIA
EE Senior Design First Place

• Motivation and Goals
• Overview
• Design
• Implementation
• Results
• Conclusions

KGKY-2 04/29/03
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Motivation and Goals
UNIVERSITY OF PENNSYLVANIA
EE Senior Design First Place

• CMOS solution for digital camera
• Low cost ? cheaper by factor of five
• Easy System-on-Chip integration advantages
• First potential commercial application of PDI
• Novel imaging technique difference between the
  two polarization directions of light proven to
  enhance image quality in light scattering
  conditions
• Fully integrated CMOS camera with PDI on-chip
• Implementation of digital camera in CMOS
  technology
• Implementation of digital camera with PDI

KGKY-3 04/29/03
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Polarization Difference Imaging
UNIVERSITY OF PENNSYLVANIA
EE Senior Design First Place

• Polarization Sum Image

• Polarization Difference Image

KGKY-4 04/29/03
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Overview
UNIVERSITY OF PENNSYLVANIA
EE Senior Design First Place
KGKY-5 04/29/03
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Design
UNIVERSITY OF PENNSYLVANIA
EE Senior Design First Place

• Pixel

• Camera Architecture

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Implementation
UNIVERSITY OF PENNSYLVANIA
EE Senior Design First Place
Lens

• Camera-on-Chip with PDI
• Dimensions 3mm x 3mm

• Digital Camera with Lens

KGKY-7 04/29/03
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Results
UNIVERSITY OF PENNSYLVANIA
EE Senior Design First Place

• Pixel Response to Light
• - Maximum light intensity
• - RST is reset pulse
• - Vp is pixel response

• Image of Double-Slit Aperture
• - Last column of pixels
• - Image of entire frame

KGKY-8 04/29/03
9
Results
UNIVERSITY OF PENNSYLVANIA
EE Senior Design First Place

• Simulation verifying functionality of PDI
  circuitry

KGKY-9 04/29/03
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Conclusion
UNIVERSITY OF PENNSYLVANIA
EE Senior Design First Place

• CMOS digital camera successfully implemented
• Competitive with conventional CCD cameras
• Low cost and easy integration advantages
• Polarization Difference Imaging integrated
  on-chip
• PDI design successfully simulated
• Novel imaging technology
• Development path to final product
• Micropolarizers on-chip
• Real-time monitor image display

KGKY-10 04/29/03